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Topic Review (Newest First)

04-29-2013 07:28 AM

Mr. P-Body

The purpose of installing headers is to isolate the exhaust pulses fom each other, aiding the sound wave in both intake "filling" and scavenging of exhaust gasses. A "3-tube" header cannot achieve isolation, as two exhaust ports are "talking to each other" on each side. If the heat crossover is not blocked or "filled", you then have FOUR cylinders "cross-talking".

Again, headers should NOT be bought based on "ease of installation". Easy ones are seldom good ones...

Jim

04-27-2013 11:45 AM

h0trod

why do you guys not like the 3 tube style headers?

04-24-2013 07:50 PM

Pantaz

Quote:

Originally Posted by starin

Hotrod confused me a little, so are you saying the hedmans ...

The Hedman #28140 are three-tube headers, so they are not a good choice.

04-16-2013 09:27 PM

h0trod

Quote:

Originally Posted by starin

Hotrod confused me a little, so are you saying the hedmans i am going to order will not be that bad to install onto my 68. you scared me about lifting the motor etc. i installed the stock log manifolds on the motor by myself and the only thing i really had to move was the starter.

be prepared to.....

04-16-2013 11:31 AM

starin

Hotrod confused me a little, so are you saying the hedmans i am going to order will not be that bad to install onto my 68. you scared me about lifting the motor etc. i installed the stock log manifolds on the motor by myself and the only thing i really had to move was the starter.

04-15-2013 10:57 AM

starin

thanks for the help, i'm goign to attempt this after the trans install i am undertaking.

04-15-2013 10:42 AM

cobalt327

Once the gaskets take a set and you're sure they're done, using locks will be worth some peace of mind. Maybe not absolutely necessary, but sure can't hurt IMHO.

04-15-2013 10:24 AM

69 widetrack

Double post.

04-15-2013 10:13 AM

69 widetrack

The most important part being the flanges...and true on both counts, re-tightening after heat cycles and being lazy are the main reasons for blowing out header gaskets...I'm guilty too...LOL.

Ray

04-15-2013 09:49 AM

h0trod

with a decent set of header flanges, and proper retightening after heat cycles, they last a while...

most people are lazy, including myself.

04-15-2013 09:44 AM

69 widetrack

No doubt they do cost money and for what you get it does look expensive...but factor in a couple of sets of gaskets and the time it take to replace them...the locks are paid for. I won't put header's on a car now without them.

For me, most of the times that I've installed headers, getting the old manifolds off was a bigger PITA than installing the Headers. I can think of a number of cars that getting Headers into the engine bay is a chore beyond belief. Most Fords with shock towers. I remember a 67 Fury that it took three men, loosening all motor mounts, dropping the starter and a mess of other things besides holding your tongue in the right position to just get the passenger side Header to even go into place, let alone putting any bolts or gaskets in.

The Pontiacs are not the toughest, but, that being said...I don't understand why people wouldn't use Header bolt locks when they install headers...Those bolts are going to loosen up after you get the Header's bolted in...Use locks and you will save time...and money, because you won't be replacing Header Gaskets nearly as often.

Ray

04-15-2013 08:52 AM

h0trod

Quote:

Originally Posted by Mr. P-Body

A/C never seemed to get in the way from under the car. That's where the majority of the "work" is.

Jim

oops! i was thinking on a different application..

a 77 firebird, with a early block, and the engine mound adapters, with AC and a 4 speed is a PITA!

with hooker super comps for edel heads.

had many many issues, i had to redirect 3 tubes
1 on the pass side to clear the AC box on the firewall,
and 2 on the drive to clear bell crank and rear lower control arm mount

04-15-2013 07:52 AM

Mr. P-Body

A/C never seemed to get in the way from under the car. That's where the majority of the "work" is.

ARP also makes header bolts with a 5/16" hex head. Makes the wrench even easier...

Good point on the slot/hole arrangement. Like Pop always said: "When all else fails, follow instructions." This info is contained in the printed install instructions from Hooker.

Jim

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